Plasmonically Enhanced Spectral Upconversion for Improved Performance of GaAs Solar Cells under Nonconcentrated Solar Illumination
Plasmonically Enhanced Spectral Upconversion for Improved Performance of GaAs Solar Cells under Nonconcentrated Solar Illumination
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DOI：
10.1021/acsphotonics.8b01245
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发表时间：
2018-10
期刊：
影响因子：
7
通讯作者：
Huandong Chen;Sung‐Min Lee;Angelo Montenegro;Dongseok Kang;B. Gai;Haneol Lim;Chayan Dutta;Wanting He;M. Lee;A. Benderskii;Jongseung Yoon
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文献类型：
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作者：
Huandong Chen;Sung‐Min Lee;Angelo Montenegro;Dongseok Kang;B. Gai;Haneol Lim;Chayan Dutta;Wanting He;M. Lee;A. Benderskii;Jongseung Yoon
光谱上转换有可能补偿单结太阳能电池的亚带隙透明度。本文提出了一种利用等离子体增强的光谱上转换技术捕获禁带以下的长波光子，从而提高其单太阳光伏性能的复合组件。在含有NaYF4：Er3+，Yb3+上转换纳米晶(UCNC)的聚合物波导上印刷了从生长晶片中释放出来的具有底部接触层的微米级超薄GaAs太阳能电池，并将其涂覆在由孔-柱混合银纳米结构组成的等离子体反射器上。与不含UCnC的纳米结构银反射体和含有UCnC的普通银反射体相比，在UCnC掺杂的等离子体衬底上的GaAs微电池的光伏效率分别提高了∼6.4%(相对)和∼11.8%(相对)，这是由于局部电场放大增强了UCnC的吸收，增强了上转换.
Spectral upconversion has the potential to compensate for sub-bandgap transparency of single-junction solar cells. Here a composite module of GaAs solar cells is presented that can improve their one-Sun photovoltaic performance by capturing long-wavelength photons below the bandgap via plasmonically enhanced spectral upconversion. Ultrathin, microscale GaAs solar cells released from the growth wafer and etched with a bottom contact layer are printed on a polymeric waveguide containing NaYF4:Er3+, Yb3+ upconversion nanocrystals (UCNC), coated on a plasmonic reflector composed of hole-post hybrid silver nanostructure. The photovoltaic efficiency of GaAs microcells on a UCNC-incorporated plasmonic substrate is increased by ∼6.4% (relative) and ∼11.8% (relative), respectively, compared to those on a nanostructured silver reflector without UCNC and on a plain silver reflector with UCNC, owing to the combined effects of local electric-field amplification to enhance the absorption of UCNC, augmented upconverted ...